Question

What are the products formed when an aqueous solution of magnesium bicarbonate is boiled?
A. $MgC{O_3},{H_2}O,C{O_2}$
B. $Mg{\left( {HC{O_3}} \right)_2},{H_2}O$
C. $Mg{\left( {OH} \right)_2},{H_2}O$
D. $Mg{\left( {OH} \right)_2},C{O_2}$

Answer 1

The products formed due to mixture of aqueous solution of magnesium bicarbonate take place as a result of boiling. Since in the reactants of the process $Mg{\left( {HC{O_3}} \right)_2}$ is only present under the action of high temperature the $Mg{\left( {HC{O_3}} \right)_2}$ breaks down into simple chemical components.

Complete Step by Step answer:
The presence of magnesium bicarbonate in water leads to hardening of water. This means such salts are present in hard water which needs to be readily removed from water and then water moves back to normal state. The removal of hardening is possible with the help of boiling the water so that the salt molecules can be separated from the water. As water gets evaporated the water vapour gets separated from the salt. The steam can be cooled down to remove salts present in water.
The removal of $C{O_2}$ and ${H_2}O$ occurs due to the increase in temperature when the aqueous solution of $Mg{\left( {HC{O_3}} \right)_2}$ is subjected to the high heat level. The breakdown of the larger chemical molecules into smaller chemical components takes place when heat is introduced and as a result of the process the chemical molecules like $C{O_2}$ and ${H_2}O$ along with the production of $MgC{O_3}$.
The bicarbonates are soluble in water and that is converted to carbonate when heat is introduced to the $Mg{\left( {HC{O_3}} \right)_2}$ aqueous solution. Thus, the resultant chemical molecule produced which is $MgC{O_3}$ and carbonate molecules are insoluble in water. This can help in easy separation of the water from these given salts from the solution.

Hence the product formed from the given reactant chemical is A that is $MgC{O_3},{H_2}O,C{O_2}$.

Note: The introduction of heat for boiling is mainly used as a separation technique. This improves the chances of removing the salt residues from a solution. When there is a single chemical compound involved, under the action of boiling that compound forms simpler molecules.